Plant growth lamp



FIG. 1 is a perspective view of a plant growth lamp showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a perspective view of the plant growth lamp where the plant growth lamp in a configuration of use;

FIG. 4 is a front elevational view of FIG. 2;

FIG. 5 is a rear elevational view of FIG. 2;

FIG. 6 is a right side elevational view of FIG. 2;

FIG. 7 is a left side elevational view of FIG. 2;

FIG. 8 is a top plan view of FIG. 2; and,

FIG. 9 is a bottom plan view of FIG. 2. 

CLAIM The ornamental design for a plant growth lamp, as shown and described. 